Noise suppression due to long-range Coulomb interaction: Crossover between diffusive and ballistic transport regimes

TL;DR

This paper uses Monte Carlo simulations to study how long-range Coulomb interactions suppress shot noise in semiconductors, revealing that suppression persists from ballistic to quasi-ballistic regimes but diminishes in diffusive conditions.

Contribution

It provides a detailed analysis of shot-noise suppression across transport regimes, highlighting the persistence of suppression from ballistic to quasi-ballistic regimes.

Findings

Shot-noise suppression persists in quasi-ballistic regime

Suppression diminishes in fully diffusive regime

Monte Carlo method effectively models Coulomb interactions

Abstract

We present a Monte Carlo analysis of shot-noise suppression due to long-range Coulomb interaction in semiconductor samples under a crossover between diffusive and ballistic transport regimes. By varying the mean time between collisions we find that the strong suppression observed under the ballistic regime persists under quasi-ballistic conditions, before being washed out when a complete diffusive regime is reached.